The springs are matched with dampers for specific weight ranges. They are rated such that they still function correctly, for the maximum weigh class of a door, after 40 000 closing cycles. When opening a door, a base force must be applied to load (tension) the spring. This might seem unfamiliar at first but is normal for the damper to function properly.
- If the force needed to open the door is still too high, the damper should be exchanged for one with a lower door weight rating.
- Please check that the weight range of the damper is suited for the specific door weight.
- If the opening force required is still too high, replace with a damper model which has a lower weight range or replace the spring with a weaker (lower elastic force rated) one.